Rotary deep-well-boring apparatus



Sept. 14 1926.

EA. REED ROTARY DEEP WELL BORING APPARATUS Patented Sept. 14, 1926.

UNITED STATES PATENT OFFICE.

EARL ABNEB REED, OF A'KEMAI-I, OKLAHOMA, ASS IGNOR TO BESS L. REED, F

HOUSTON, TEXAS. I

ROTARY DEEP-WEIlL-BORING APPARATUS.

Application filed August 21, 1924. Serial No. 733,410.

The invention concerns the general form of the bit head and the roller cutter organization.

In the accompanying drawings Figure l is a vertical sectional view on the line 1-l of Fig.

Fig. 2 is a bottom plan view.

Fig. 3 is a vertical sectional view on the line 33 of Fig. 2, and

Fig. 4 is a view similar to a portion of Fig. 3, but showing a modification in respect to the mounting of the side roller cutter.

In the drawings a is the main body of the bit head, having side pockets a inclining upwardly and inwardly and in which are lo cated side cutters of known form. The outer overhanging wall of these side pockets is shown at a in which there is an opening to receive the journal pin of the rotary cutter. These side pockets are at diametrically opposite sides ofv the bit head. The inner walls of the pockets are indicated at a and these incline downwardly and outwardly from the head. Extending between these inner walls of the pockets and reaching down from the solid body of the head are the walls a of which there are three. The outer walls of this set connect the walls a at the ends thereof. Theintermediate wall of the set is parallel with the outer walls, but is unequally spaced in relation thereto. On the outer sides of the outer walls a and formed integral therewith are the pinsor studs 0 which are threaded to receive the retaining and bearing members 4 of the outer rotary cutters 1. The members 4: are shouldered at l and the rotary toothed cutters 1 are shouldered to correspond, so that while the cutters may roll on the members 4:, they will be held in place by said members, which are threaded to screw onto the threaded pins or studs 0. The cutters 1 are cylindrical and are arranged with their axes at right angles to the vertical axis of the apparatus, and when used with cylindrical rotary cutters in the inclined pockets they will cut a zone overlapping that cut by the said inclined cutters and break down the angular or inclined walls left by the latter.

. Rotary cylindrical cutters 2 and 3 are arranged in pairs between the outer walls a and the intermediate wall 00 and for affording a journal for these cuttersa pin 5 is employed, onto which the cutters are assembled before being placed in the head, and then said cutters with the pin are slipped. as one body into place in the walls a For this purpose the central one of the webs or walls a is formed with a recess or notch a opening clear through its lower edge and the inner faces of the outer webs or walls of the set a are formed with chan nels or ways a, so that the ends of the pin 5 may slide vertically to a seating at the upper ends of the channels. The notch or recess in the central web is of sufiicient height or length to allow the pin 5 to register axially with the axes of the integral side studs or bearings 0, and the upper wall of this recess or notch-will afford a bearing to receive the up-thrust of the pin. The pin 5 is slabbed off or flattened on its sides to bear on the vertical walls of the notch and channels so that some support will be afforded by the engagement of the ends of theflattened pin 5 with the channels, as well as engagement of the pin with the central web- The pin 5 may be held in place in various ways, for instance, by a in or rod 5' passingthrough the integra l bearings 0 and through the webs and of course through the pin 5, and this pin may be held in place by the nuts or bearings 4, the heads of which are closed and adapted to bear on the ends of the pin. The nuts 4 may be suitably formed to receive a wrench, for which purpose they may have exterior socket openings. The main function of this pin 5 is to hold the bearing 5 from dropping out when the apparatus is lifted from the well. So far as resisting the up-thrust of the central roller cutter organization is concerned, it has no work to perform, because this up-thrust will be borne by the upper wall of the U-shaped notch in the intermediate web or wall, and the upper shoulder a" of the channel in the inner faces of the side webs or walls a".

his bit has the advantage of eliminating wear that occurs in existing forms of rollercutter organizations at the ends of the cross roller pin. The bit head above described is rugged and the cutters, not being housed in the head. will permit successful use in formations like lime, that in those forms of apparatus having housed cutters, causes packing of the material'and chocking of the cutters against rotation.

The cutters may be either of cylindrical shape, or conical. The bearing 4 may be ,VVall a cutter 1.

either cylindrical or conical. The side cutters may be arranged in pockets of the head, as above described, and have their journal pins supported at both ends in the walls of the pockets, or these side cutters may be supported on pins, Fig. 4, which are integral with the walls a, the overhangim Walls a being oinitted, and these integral pins on would project upwardly on an inclination. The head would have the usual threaded shank. Two sides of the head would be en'- tirely cut away, as compared with the common type of head. That is to say, there would be no body metal of the head above and overhanging the cutter 1, the line b7), defining the shape and limits of the lateral dimension of the head at this point, and

if the side cutters are mounted on the integral pins above described the limits of the lateral dimension of the head here would be defined by the line dd, which is a reduction in respect to that form of head in which the side cutter is carried by a pin supported at its outer end'in the overhanging wall a It will be seen from the above that the head has a recess at its lower end defined by the walls a at diametrically opposite points connected by webs a (the two outer ones) which are parallel and which reach down from the main body of the head, and that there is an intermediate wall a and the dispostion of these walls and cutters is such that some part of the cutter organization will track with some portion of the web or wall organization, so that no part of the area covered by the lower face of the head will be left uncut, it being noted in this connection that the intermediate web a will be tracked by cutter 3; the right hand web a in Fig. 2 which is located nearer the axial center of the head than its companion a atthe left of the figure will be tracked by cutter 2 will be tracked by the right hand It will be noted also that the right hand cutter 1 is of greater width than the left hand cutter 1; and that the left hand web at will be tracked by the right hand cutter 1. The rectangular web or wall formation at the bottom of the head has cutters both inside and outside of it and the outside cutters are disposed at each of the four sides of the rectangle.

Provision is made for the flow of flushing water to the cutters, as in common practice, from the central bore of the apparatus through suitable ports.

The pin 5 need be flattened only at the points where it engages the webs a At other places it would be cylindrical to afford good bearing for the roller cutters.

In assembling the cutter organization shown in Fig. 1, the cutters 2 and 3 are first mounted on the pin 5, then this pin is slipped into. place in the recess of the central web and the channels of the other webs and its opening brought into line axially with the openings through the bearing studs 0. Then the pin 5 is slipped into place and the bearings or nuts 4 are assembled with their cutters 1 and these are then placed.

The retaining pin 5 may be substituted by two pins passing through the integral studs and ehtering recesses in the ends of the bearing pin 5. In this instance the bearing pin would be solid except for the small end portions 'containing the recesses. These pins would be held in place by the nuts or wear pieces 4, as above described.

I claim:

1. In combination in a rotary deep well drilling apparatus, a bit head having webs or walls projecting down from its lower end on opposite sides of the vertical axis, and parallel with each other,a pin having its ends in channels in the inner faces of said walls and bearing against shoulders at the upper ends of said channels rotary cutters on the pin, and rotary cutters exterior to said walls and substantially in axial align-v ment with the rotary cutters first mentioned, substantially as described.

2. In combination in a rotary deep welldrilling apparatus, a bit head having webs or walls projecting down from its lower end and including side walls and an interme diate wall, parallel with the side walls, said side walls having channels in their inner faces and said intermediate wall having a notch or recess, a pin adapted to be slipped into place with its ends in the channels and its middle portion in the notch or recess of th intermediate web roller cutters mounted on the pin on opposite sides of the said intermediate wall, and roller cutters mounted exterior to the side walls, substantially as described.

3. In combination drilling apparatus, lel webs or walls projecting from its lower end, having thrust shoulders on their inner faces, a pin engaging said shoulders, roller cutters on said pin, said walls having bearing studs on their exterior faces, removable wear members screw threaded onto the said studs, roller cutters on said wear members, and a retaining rod passing through the studs and the pin and held in place by said wear members.

4;. In combination in a deep well drilling apparatus, a drill bit including a head, a cutter supporting bearing thereon, revoluble cutters on said bearing extending diametrically across the of the head, cutters supported by spindles integral with the head, co-axial with the said bearing extending diametrically across the center of one end of the head, and in the same horizontal plane therewith, and side cutters revoluble in planes converging in the head.

in a rotary deep well a bit head having paralcenter of one end 5. In combination, a bit head having proand said side walls having abutments or jecting parallel walls, a bearing pin between shoulders, a member fitted to the slot of the said walls, rotary cutters thereon, integral intermediate wall and bearing upon the studs on the exterior of the walls, roller cutshoulders of the side walls to sustain upters thereon, means extending through said ward thrust, rotary cutters on said member studs for holding the bearing pin, and means between the side and intermediate wall and on the studs for retaining said means and on each side of the latter, means for holding the rotary .cutters on said studs. the said member in place and rotary cutters 6. In combination, in a deep well boring outside the side walls, substantially as deapparatus, a head, side walls, and an intermescribed. diate wall projecting downwardly from said head, said intermediate wall being slotted EARL ABNER REED. 

